“休闲服装”常见的英文表达是 casual wear 或 casual clothes。
casual wear 更侧重于描述一种风格或类别，指在日常轻松场合穿着的服装，强调随意、不拘谨的特点。例如：Casual wear has become increasingly popular in recent years.（近年来，休闲服装变得越来越流行。）
casual clothes 强调具体的衣物，指那些适合休闲场合穿着的衣服。例如：I like to wear casual clothes on weekends.（我周末喜欢穿休闲衣服。 ）